<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .box{
            width:150px;
            height:150px;
            background-color:darkblue;
            /*边框圆角*/
          /*  border-radius: 10px;
            border-radius: 50%;*/

            /*border-radius: 0px 20px 0px 40px;
            */
            -webkit-border-top-left-radius: 30px;
            border-top-right-radius: 50px;

        }
    </style>
</head>
<body>
<div class="box"></div>
</body>
</html>